Cerous acetate

P. T. Cleve26 prepared an insoluble thorium periodate by adding periodio acid to a thorium salt soln. and periodic acid produces a precipitate of cerous periodate when added to cerous acetate. The precipitate rapidly becomes yellow. 

Cerous acetate [537-00-8] M 317.3. Crystd twice from anhydrous acetic acid, then pumped dry under vacuum at 100° for 8h. 

Acetic acid, cerium(3+) salt Cerium acetate Cerium triacetate Cerium(3+) acetate Cerium(lll) acetate Cerous acetate EINECS 208-654-0. 

Miscellaneous Compounds. Among simple ionic salts cerium(III) acetate [17829-82-2] as commercially prepared, has lV2 H2O, has a moderate (- 100 g/L) aqueous solubiUty that decreases with increased temperature, and is an attractive precursor to the oxide. Cerous sulfate [13454-94-9] can be made in a wide range of hydrated forms and has solubiUty behavior comparable to that of the acetate. Many double sulfates having alkaU metal and/or ammonium cations, and varying degrees of aqueous solubiUty are known. Cerium(III) phosphate [13454-71 -2] being equivalent to mona2ite, is very stable. 

Catechol, 47, 60, 120, 128, 451, 467-A68, 837, 857, 1011-1012 carbonate, 119-120 dibenzenesulfonate, 47 dichloromethylene ether, 119-120 Catechyl phosphorus trichloride, 120 Cathyl chloride (Ethyl chloroformate), 86, 239, 363, 364-367 Cedrol.913 Cdite, 120 Cellobiose, 893 o-Cellobiose oclaacetate, 158 Cfmulsol, 820 o-Cephalins, 847 Ceric acetate, 1062 Ceric ammonium nitrate, 120-121 Cerous chloride, 121 Cerous hydroxide, 121 Cesium fluoride, 117,121, 933 Cetyl alcohol, 497, 862 Cetyl iodide, 497, 862, 1279 Cetyltrimethylamroonium horohydride, 1143 Cetyltrimelhylaromonium bromide, 121-122 Cevadine, 798 Ovine, 59... 

Further purification of HP-j8-CDs can be carried out through the thin layer chromatography. A formula for developing was propanol, ethyl acetate, aqua ammonia and water were prepared by 6 1 1 3, or acetonitrile, water, aqua ammonia was mixed by 6 3 1, the latter formula has a shorter developing time. The color development reagents are cerous sulfate 1 g, ammonium molybdate 24 g, concentrated sulfuric acid 50 mb, 450 mL deionized water. Because of the adsorption principle of the silica gel, the more the substituent on the HP- -CDs, the faster the molecules will move. Therefore, the high DS HP-)3-CDs move a long distance. Furthermore, HP-j8-CDs can be purified by sihca column. The mobile phase was chloroform/methanol (100 1) [26]. 

The scope of the catalytic potential of the cerium(III) ion was intimated by Pratt (1962) in an investigation of the addition of aromatic amines to quinones. Use of hydrated cerous chloride in place of cupric acetate as an oxygen carrier in the oxidation of byproduct hydroquinone resulted in improved yields and easier product separation from metal complexes. 

In each of a series of 100 ml calibrated flasks place 50 ml of distilled water, an accurately measured volume between 2 and 8 ml of standard fluoride solution, 10 ml of alizarin complexan solution and 3 ml of acetate buffer solution. Mix each solution thoroughly, add 10 ml of 0.0005 M cerous nitrate, dilute to the mark with distilled water and set aside, protected from direct light for 1 hour. At the same time, prepare a blank solution in a similar fashion by omitting the standard fluoride solution. Measure the optical densities of the test solutions against the blank in 4 cm cells at 610 nm and plot a graph of optical density against amount of fluoride present. 

Cerous nitrate, 0.0005 M, standardise approximately 0.02 M cerous nitrate by titration against standard ethylenediaminetetra-acetic acid solution at pH 6 with xylenol orange as indicator. To a suitable volume of this solution (about 50 ml) add 0.2 ml of concentrated nitric acid, 0.1 g of hydroxylamine hydrochloride and sufficient water to produce 2 litres and filter. 

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